标准号:IS 7931 Pt.1-1975
发布日期:1976/4/1 12:00:00
实施日期:1999/12/31 12:00:00
适用范围:1.1 This standard (Part I ) lays down the requirements, tests and service conditions for dc arc welding generator power source having a substantially flat load characteristic for semi-automatic and automatic arc welding with self-adjusting arcs ( MIG/MAG processes ).1.2 The windings of generator covered by this standard are of insulation classes A, E, B, F and H.1.3 Welding generators covered by this standard are assigned ratings on the basis of duty cycle.